| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D040209.2 | NSA/TWRCAM/C2 - Reflection on image during darkness | nsatwrcam3mC2.a1 |
| D090302.1 | NSA/TSI/C1 - Mirror frozen | nsatsicldmaskC1.a1, nsatsiskycoverC1.b1, nsatsiskyimageC1.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/02/2002 | 0000 | 06/30/2004 | 2359 |
| Subject: | NSA/TWRCAM/C2 - Reflection on image during darkness |
| DataStreams: | nsatwrcam3mC2.a1 |
| Description: | During darkness, there appears to be a green light on the ground about 7 meters from the tower the camera is pointing at. We have deduced that this is, in fact, a reflection of a LED behind the camera in its housing. This spring, the camera will be slid forward towards the enclosure window eliminating this reflection. Since the images are of minimal use during darkness, this DQR is being submitted to explain the existence of the reflection. |
| Measurements: | nsatwrcam3mC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/28/2009 | 1813 | 02/28/2009 | 2125 |
| Subject: | NSA/TSI/C1 - Mirror frozen |
| DataStreams: | nsatsicldmaskC1.a1, nsatsiskycoverC1.b1, nsatsiskyimageC1.a1 |
| Description: | The mirror was not rotating so the shadowband was not masking the sun. This appears to have been caused by snow that was melted by the mirror heater and then re-frozen by high, cold winds. |
| Measurements: | nsatsiskyimageC1.a1:
nsatsicldmaskC1.a1:
nsatsiskycoverC1.b1:
|